I like the portrait but I see two things that could be fixed to make it look a bit better. First real issue is the shading/lighting on the nose. It looks like she has one nostril, and the lighting suggests that her nose is facing forward, when you can tell by the rest of the portrait that she has her head turned very slightly to the right. The other thing I see is that the sides of her lower lip could come in a little further to the middle. Its still pretty nice overall!